Afghan refugee children play next to a puddle of water in a slum area on the outskirts of Islamabad, Pakistan. Muhammed Muheisen/AP

Shire horses mow the the Olympic Rings into the grass at Richmond Park in London. The Rings are visible on the Heathrow flight path, ready to welcome athletes and visitors to the London 2012 Games. LOCOG/AP

Traditional dancers perform during celebrations to mark the first anniversary of the Republic of South Sudan's independence in its capital of Juba.

Syrian refugee children flash victory signs as they look out from behind a fence at Yayladagi refugee camp in Turkey's Hatay province near the Turkish-Syrian border. Umit Bektas/Reuters

A sunbather takes a shower at Alimos beach near Athens. Temperatures are predicted to reach 102.2 degrees Fahrenheit in Greece today. Petros Giannakouris/AP

A Congolese woman stands inside her cosmetic shop in Bunagana near the Uganda-Democratic Republic of Congo border. James Akena/Reuters

A boy gestures behind a sign outside the Department of Environment and Natural Resources during a rally in Quezon City, Metro Manila, Philippines.

A fisherwoman (l.) bathes her four-month-old daughter Anitha on the banks of Vembanad Lake in the southern Indian city of Kochi. Sivaram V./Reuters

An Afghan man with mental health problems sits on the wet floor as he is chained to the wall of a room at the Mia Ali Baba shrine Jalalabad, Afghanistan due to a traditional belief that spending 40 days chained in isolation at the shrine can cure illness in Jalalabad, Afghanistan. Parwiz/Reuters

A vendor packs a bunch of asparagus for sale at a market in central Beijing. Jason Lee/Reuters

'Locks of love' are displayed on top of Mt. Nam or Namsan in central Seoul, South Korea. Young couples come to the top of the mountain to hang their locks of love and throw the keys away in the hope for eternal love. Kim Hong-Ji/Reuters

US President Barack Obama delivers a statement calling for a one-year extension of Bush-era tax cuts in the East Room of the White House in Washington. Jason Reed/Reuters

Children carrying balloons walk past a red tarpaulin on the fourth day of the San Fermin festival in Pamplona, Spain. Eloy Alonso/Reuters

Radioshack-Nissan rider Fabian Cancellara of Switzerland cycles during a training before the individual time trial in the ninth stage of the 99th Tour de France cycling race between Arc et Senans and Besancon in France. Stephane Mahe/Reuters

Palestinian children take part in a summer camp organized by the Hamas movement at Shati refugee camp in Gaza City. Suhaib Salem/Reuters

Bosnian Muslim women pray near the coffin of a relative among 520 newly identified Srebrenica victims at the Potocari memorial cemetery near Srebrenica, east of Sarajevo, Bosnia and Herzegovina. Amel Emric/AP

A Mongolian man takes a nap next to a military officer as others watch a rehearsal of a military parade during the Naadam Festival on the Sukhbaatar Square in Ulan Bator, Mongolia. Andy Wong/AP

Children play near the Old Clifton Monument in Karachi, Pakistan. Shakil Adil/AP

A woman walks through a passage in downtown Belgrade, Serbia. Darko Vojinovic/AP

Members of the Honeys and Bears senior synchronized swim group perform at Harlem's Thomas Jefferson Park pool in New York. The group, founded in 1979, has 10 men and 31 women aged 62 to 100 who meet at least twice a week to practice. Kathy Willens/AP

A man carries his knife-sharpening machine near Buriganga river in Dhaka, Bangladesh. Andrew Biraj/Reuters

A kayaker floats near the Brazilian tall ship Cisne Branco at Fort Trumbull State Park in New London, Conn. The 256-foot tall ship is the official training vessel of the Brazilian Navy. Sean D. Elliot/The Day/AP

A supporter of Egypt's first Islamist President Mohamed Mursi celebrates on his motorbike at Tahrir Square in Cairo. On Sunday, Mursi ordered a parliament dominated by his Islamist party to reconvene, challenging the authority of the generals who had dissolved the assembly in line with a court order. Amr Abdallah Dalsh/Reuters

Assailed first by a debt crisis, then acting as a front line in Europe’s migrant crisis, Greece has had an extremely difficult few years. Yet it has avoided civil conflict and has remained in the eurozone, contrary to many expectations.